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Finding the Fourth Proportional to 15,562.80, 21,826.80 and 15,562.80

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Solution

The fourth proportional to 15,562.80, 21,826.80 and 15,562.80 is: 21,826.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,562.80 : 21,826.80 = 15,562.80 : x
  2. Step 2: Convert to fraction form
    15,562.80/21,826.80 = 15,562.80/x
  3. Step 3: Cross multiply
    15,562.80x = 21,826.80 × 15,562.80
  4. Step 4: Simplify right side
    15,562.80x = 339,686,123.04
  5. Step 5: Solve for x
    x = 339,686,123.04/15,562.80
  6. Step 6: Final answer
    x = 21,826.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.